I live in a small apartment building inhabited by almost exclusively single mothers, the woman above me included. I have met her briefly in the hallways, and helped her bring in her groceries once.
She has recently gotten a boyfriend, and I know this because they have very loud sex directly above me. I'm not talking I can hear the bed rocking, I am saying I can hear both of them moaning. She will also have screaming break-ups with this man over the phone. All of this happens when the kids (a toddler and an infant) are at home and awake. At first, it was awkward but I was fully willing to just be like "okay good for her" and put some headphones in for a bit. But it's at random times of day, sometimes for an hour or more. So, today I started playing some incredibly unsexy music (Inside by Bo Burnham, etc) at max volume on my computer speakers. Whether because they were done or because of my music/the realization I can hear every weird thing they call each other, they stopped quickly.